These people have lock repair kits and sets, the repair kit allows you to select the right wards to still use the original key
( the locks wear far more than the keys) so you still have your original immobiliser chip and no messing with the electronics side, simpler and cheaper, I have used a number of these and once youve done one they are a piece of cake, this ad is for the ign lock but they have the door ones too, you usually only need to do ign and drivers door, for obvious reasons.
mt
http://www.ebay.co.uk/itm/110383563333? ... 1423.l2649